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The product of two positive numbers is 21600. If one number is six times the other, the sum of the two numbers is

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The product of two positive numbers is 21600. If one number is six times the other, the sum of the two numbers is


1). 420
2). 60
3). 64
4). 600


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Answered by on | Votes 3 |

Let the two numbers be x and y = 6x. Then xy = 21600 ⇒ 6x2 = 21600 ⇒ x2 = 3600 ⇒ x = 60

∴ x + y = x + 6x = 7x = 7(60) = 420

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